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path: root/drivers/gpu/drm/drm_rect.c
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2019-02-07drm: Nuke drm_calc_{h,v}scale_relaxed()Ville Syrjälä
The fuzzy drm_calc_{h,v}scale_relaxed() helpers are no longer used. Throw them in the bin. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20190206183204.21127-1-ville.syrjala@linux.intel.com Acked-by: Alex Deucher <alexander.deucher@amd.com>
2018-05-04drm/rect: Handle rounding errors in drm_rect_clip_scaled, v3.Maarten Lankhorst
Instead of relying on a scale which may increase rounding errors, clip src by doing: src * (dst - clip) / dst and rounding the result away from 1, so the new coordinates get closer to 1. We won't need to fix up with a magic macro afterwards, because our scaling factor will never go to the other side of 1. Changes since v1: - Adjust dst immediately, else drm_rect_width/height on dst gives bogus results. Change since v2: - Get rid of macros and use 64-bits math. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> [mlankhorst: Add Villes comment, and rename newsrc to tmp. (Ville)] Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180503112217.37292-3-maarten.lankhorst@linux.intel.com
2018-05-04drm/rect: Round above 1 << 16 upwards to correct scale calculation functions.Maarten Lankhorst
When calculating limits we want to be as pessimistic as possible, so we have to explicitly say whether we want to round up or down to accurately calculate whether we are below min_scale or above max_scale. Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> [mlankhorst: Fix wording in documentation. (Ville)] Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180503112217.37292-2-maarten.lankhorst@linux.intel.com
2018-05-02drm/rect: Fix drm_rect_rotation_inv() docsVille Syrjälä
An overeager sed has corrupted the drm_rect_rotation_inv() documentation. Fix it up. Looks like it wasn't entirely correct before the sed fail either. We were missing _rect_ from the function names, which also explains why the sed hit these by accident. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20180426141631.15798-1-ville.syrjala@linux.intel.com Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2017-05-22drm: Add DRM_MODE_ROTATE_ and DRM_MODE_REFLECT_ to UAPIRobert Foss
Add DRM_MODE_ROTATE_ and DRM_MODE_REFLECT_ defines to the UAPI as a convenience. Ideally the DRM_ROTATE_ and DRM_REFLECT_ property ids are looked up through the atomic API, but realizing that userspace is likely to take shortcuts and assume that the enum values are what is sent over the wire. As a result these defines are provided purely as a convenience to userspace applications. Changes since v3: - Switched away from past tense in comments - Add define name change to previously mis-spelled DRM_REFLECT_X comment - Improved the comment for the DRM_MODE_REFLECT_<axis> comment Changes since v2: - Changed define prefix from DRM_MODE_PROP_ to DRM_MODE_ - Fix compilation errors - Changed comment formatting - Deduplicated comment lines - Clarified DRM_MODE_PROP_REFLECT_ comment Changes since v1: - Moved defines from drm.h to drm_mode.h - Changed define prefix from DRM_ to DRM_MODE_PROP_ - Updated uses of the defines to the new prefix - Removed include from drm_rect.c - Stopped using the BIT() macro Signed-off-by: Robert Foss <robert.foss@collabora.com> Reviewed-by: Emil Velikov <emil.velikov@collabora.com> Reviewed-by: Sinclair Yeh <syeh@vmware.com> Acked-by: Liviu Dudau <Liviu.Dudau@arm.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20170519205017.23307-2-robert.foss@collabora.com
2016-12-30drm/rect: Fix formatting of example codeDaniel Vetter
Drive-by polish. Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1483044517-5770-9-git-send-email-daniel.vetter@ffwll.ch
2016-11-08drm: helper macros to print composite typesRob Clark
I'll want to print things in a similar way in a later patch. This will make it easier. Signed-off-by: Rob Clark <robdclark@gmail.com> Reviewed-by: Sean Paul <seanpaul@chromium.org> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: http://patchwork.freedesktop.org/patch/msgid/1478358492-30738-2-git-send-email-robdclark@gmail.com
2016-08-08drm: Warn about negative sizes when calculating scale factorVille Syrjälä
Passing negative width/hight to scale factor calculations is not legal. Let's WARN if that happens. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: http://patchwork.freedesktop.org/patch/msgid/1469549224-1860-2-git-send-email-ville.syrjala@linux.intel.com
2016-08-08drm: BIT(DRM_ROTATE_?) -> DRM_ROTATE_?Joonas Lahtinen
Only property creation uses the rotation as an index, so convert the to figure the index when needed. v2: Use the new defines to build the _MASK defines (Sean) Cc: intel-gfx@lists.freedesktop.org Cc: linux-arm-msm@vger.kernel.org Cc: freedreno@lists.freedesktop.org Cc: malidp@foss.arm.com Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Liviu Dudau <Liviu.Dudau@arm.com> Cc: Sean Paul <seanpaul@chromium.org> Acked-by: Liviu Dudau <Liviu.Dudau@arm.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> (v1) Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Signed-off-by: Sean Paul <seanpaul@chromium.org> Link: http://patchwork.freedesktop.org/patch/msgid/1469771405-17653-1-git-send-email-joonas.lahtinen@linux.intel.com
2015-11-24drm: Add "prefix" parameter to drm_rect_debug_print()Ville Syrjälä
Allow the caller to specify a "prefix" string to drm_rect_debug_print() to make it easier to see which drm_rect is being printed. Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-10-05drm: Use DRM_ROTATE_MASK and DRM_REFLECT_MASKJoonas Lahtinen
Avoid magic numbers and use the introduced defines. Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2014-07-11drm: Add drm_rect rotation functionsVille Syrjälä
Add some helper functions to move drm_rects between different rotated coordinate spaces. One function does the forward transform and another does the inverse. Cc: dri-devel@lists.freedesktop.org Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by: Imre Deak <imre.deak@intel.com> Acked-by: Dave Airlie <airlied@linux.ie> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2013-04-30drm: Add drm_rect_debug_print()Ville Syrjälä
Add a debug function to print the rectangle in a human readable format. v2: Renamed drm_region to drm_rect, the function from drm_region_debug to drm_rect_debug_print(), and use %+d instead of +%d in the format. v3: Use %d format for width/height in the non fixed point case as well Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Acked-by: Dave Airlie <airlied@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2013-04-30drm: Add drm_rect_calc_{hscale, vscale}() utility functionsVille Syrjälä
These functions calculate the scaling factor based on the source and destination rectangles. There are two version of the functions, the strict ones that will return an error if the min/max scaling factor is exceeded, and the relaxed versions that will adjust the src/dst rectangles in order to keep the scaling factor withing the limits. v2: Return error instead of adjusting regions, refactor common parts into one function, and split into strict and relaxed versions. v3: Renamed drm_region to drm_rect, add "_rect_" to the function names. v4: Fix "calculcate" typos Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Acked-by: Dave Airlie <airlied@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2013-04-30drm: Add struct drm_rect and assorted utility functionsVille Syrjälä
struct drm_rect represents a simple rectangle. The utility functions are there to help driver writers. v2: Moved the region stuff into its own file, made the smaller funcs static inline, used 64bit maths in the scaled clipping function to avoid overflows (instead it will saturate to INT_MIN or INT_MAX). v3: Renamed drm_region to drm_rect, drm_region_clip to drm_rect_intersect, and drm_region_subsample to drm_rect_downscale. v4: Renamed some function parameters, improve kernel-doc comments a bit, and actually generate documentation for drm_rect.[ch]. v5: s/RETUTRNS/RETURNS/ Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Acked-by: Dave Airlie <airlied@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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